perf session: Add swap operation for event TIME_CONV

Since commit d110162cafc8 ("perf tsc: Support cap_user_time_short for
event TIME_CONV"), the event PERF_RECORD_TIME_CONV has extended the data
structure for clock parameters.

To be backwards-compatible, this patch adds a dedicated swap operation
for the event PERF_RECORD_TIME_CONV, based on checking if the event
contains field "time_cycles", it can support both for the old and new
event formats.

Fixes: d110162cafc8 ("perf tsc: Support cap_user_time_short for event TIME_CONV")
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steve MacLean <Steve.MacLean@Microsoft.com>
Cc: Yonatan Goldschmidt <yonatan.goldschmidt@granulate.io>
Link: https://lore.kernel.org/r/20210428120915.7123-4-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index a6659b6..cc954b1 100644 (file)
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -949,6 +949,19 @@ static void perf_event__stat_round_swap(union perf_event *event,
        event->stat_round.time = bswap_64(event->stat_round.time);
 }
 
+static void perf_event__time_conv_swap(union perf_event *event,
+                                      bool sample_id_all __maybe_unused)
+{
+       event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
+       event->time_conv.time_mult  = bswap_64(event->time_conv.time_mult);
+       event->time_conv.time_zero  = bswap_64(event->time_conv.time_zero);
+
+       if (event_contains(event->time_conv, time_cycles)) {
+               event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
+               event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
+       }
+}
+
 typedef void (*perf_event__swap_op)(union perf_event *event,
                                    bool sample_id_all);
 
@@ -985,7 +998,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
        [PERF_RECORD_STAT]                = perf_event__stat_swap,
        [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
        [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
-       [PERF_RECORD_TIME_CONV]           = perf_event__all64_swap,
+       [PERF_RECORD_TIME_CONV]           = perf_event__time_conv_swap,
        [PERF_RECORD_HEADER_MAX]          = NULL,
 };